According to Genesis chapter 1: verse 28 of The King James Version Bible -
28 And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth.Here, the first law of nature is found in the form of human being procreation.
Also the law of survival of the fittest.